Finding the Fourth Proportional to 1,045.35, 1,442.67 and 603.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.35 : 1,442.67 = 603.40 : x
2. Step 2: Convert to fraction form
   1,045.35/1,442.67 = 603.40/x
3. Step 3: Cross multiply
   1,045.35x = 1,442.67 × 603.40
4. Step 4: Simplify right side
   1,045.35x = 870,499.86
5. Step 5: Solve for x
   x = 870,499.86/1,045.35
6. Step 6: Final answer
   x = 832.74